Duffel bag



FIG. 1 is a top, front, right perspective view of a duffel bag showing my new design;

FIG. 2 is a top front, left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The uneven-length broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the claimed design. The even-length broken lines within the shaded area in FIGS. 4 and 7 represent an unclaimed feature. The even-length broken lines show the remainder of the duffel bag. All broken lines shown are for the purposes of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a duffel bag, as shown and described. 